Designed with the competitive shooter in mind, for very high round count. Uniquely designed hardened stainless steel interfacing barrel shank, allows for greater rigidity between receiver and barrel. Intended for extended round count performance and reduced breech face wear. Hardened stainless steel muzzle and threads provide reinforced suppressor attachment. The Performance HD barrel is designed to deliver match-grade consistency, accuracy, and durability. The updated design of the Performance HD barrel increases overall longevity and continued performance.